The number of marbles in the rows forms the sequence 1, 2, 3, ..., 25. The total number of marbles used is the sum of the first 25 natural numbers: S = 1 + 2 + 3 + ... + 25. Using the formula for the sum of the first n natural numbers: Sn = n(n + 1) / 2 For n = 25: S25 = 25 x (25 + 1) / 2 S25 = 25 xRead more
The number of marbles in the rows forms the sequence 1, 2, 3, …, 25.
The total number of marbles used is the sum of the first 25 natural numbers:
S = 1 + 2 + 3 + … + 25.
Using the formula for the sum of the first n natural numbers:
Sn = n(n + 1) / 2
For n = 25:
S25 = 25 x (25 + 1) / 2
S25 = 25 x 26 / 2
S25 = 25 x 13 = 325.
Thus, the child uses a total of 325 marbles.
For more NCERT Solutions of Class 9 Ganita Manjari Chapter 8 Predicting What Comes Next: Exploring Sequences and Progressions Question Answer (2026-27)
In this arithmetic progression, the first term is a = 3 and the common difference is d = 8 - 3 = 5. The nth term of an AP is given by the formula tn = a + (n - 1)d. To find the 10th term, substitute n = 10: t10 = 3 + (10 - 1) x 5 = 3 + 9 x 5 = 3 + 45 = 48. To find the 26th term, substitute n = 26: tRead more
In this arithmetic progression, the first term is a = 3 and the common difference is d = 8 – 3 = 5. The nth term of an AP is given by the formula tn = a + (n – 1)d. To find the 10th term, substitute n = 10: t10 = 3 + (10 – 1) x 5 = 3 + 9 x 5 = 3 + 45 = 48. To find the 26th term, substitute n = 26: t26 = 3 + (26 – 1) x 5 = 3 + 25 x 5 = 3 + 125 = 128. Thus, the terms are 48 and 128.
For more NCERT Solutions of Class 9 Ganita Manjari Chapter 8 Predicting What Comes Next: Exploring Sequences and Progressions Question Answer (2026-27)
The correct answer is C. nostalgic. Grandpa feels nostalgic when he remembers his old house in town. He misses its peaceful surroundings, garden and especially the big mango tree. These memories remind him of the comfortable and familiar life he enjoyed there. His dislike of the noisy city and his lRead more
The correct answer is C. nostalgic. Grandpa feels nostalgic when he remembers his old house in town. He misses its peaceful surroundings, garden and especially the big mango tree. These memories remind him of the comfortable and familiar life he enjoyed there. His dislike of the noisy city and his longing for his old home clearly show his deep attachment to his past and familiar surroundings.
For more NCERT Solutions of Class 9 English Kaveri Chapter 4 Vitamin-M Question Answer (2026-27)
Grandpa gave Ravi a detective story book because he seemed to know that Ravi had secretly followed him throughout the day. He told Ravi to learn how to avoid getting fooled while trailing a suspect. This was a playful hint about Ravi’s unsuccessful detective work. The twinkle in Grandpa’s eye also sRead more
Grandpa gave Ravi a detective story book because he seemed to know that Ravi had secretly followed him throughout the day. He told Ravi to learn how to avoid getting fooled while trailing a suspect. This was a playful hint about Ravi’s unsuccessful detective work. The twinkle in Grandpa’s eye also suggests that he was mischievously aware of what Ravi had done.
For more NCERT Solutions of Class 9 English Kaveri Chapter 4 Vitamin-M Question Answer (2026-27)
Grandpa’s habit of giving gifts to everyone on his birthday highlights his generous, affectionate and selfless nature. He continued to think of Ravi, his mother and father as his “babies” and wanted to make them happy. Instead of focusing on receiving gifts, he enjoyed giving them. This habit also sRead more
Grandpa’s habit of giving gifts to everyone on his birthday highlights his generous, affectionate and selfless nature. He continued to think of Ravi, his mother and father as his “babies” and wanted to make them happy. Instead of focusing on receiving gifts, he enjoyed giving them. This habit also shows his strong emotional connection with his family and his loving role within it.
For more NCERT Solutions of Class 9 English Kaveri Chapter 4 Vitamin-M Question Answer (2026-27)
A child arranges marbles in rows so that the first row has 1 marble, the second has 2 marbles, the third has 3 and so on up to 25 rows. How many marbles does the child use in all?
The number of marbles in the rows forms the sequence 1, 2, 3, ..., 25. The total number of marbles used is the sum of the first 25 natural numbers: S = 1 + 2 + 3 + ... + 25. Using the formula for the sum of the first n natural numbers: Sn = n(n + 1) / 2 For n = 25: S25 = 25 x (25 + 1) / 2 S25 = 25 xRead more
The number of marbles in the rows forms the sequence 1, 2, 3, …, 25.
The total number of marbles used is the sum of the first 25 natural numbers:
S = 1 + 2 + 3 + … + 25.
Using the formula for the sum of the first n natural numbers:
Sn = n(n + 1) / 2
For n = 25:
S25 = 25 x (25 + 1) / 2
S25 = 25 x 26 / 2
S25 = 25 x 13 = 325.
Thus, the child uses a total of 325 marbles.
For more NCERT Solutions of Class 9 Ganita Manjari Chapter 8 Predicting What Comes Next: Exploring Sequences and Progressions Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-8/
See lessFind the 10th and 26th terms of the AP: 3, 8, 13, 18, ….
In this arithmetic progression, the first term is a = 3 and the common difference is d = 8 - 3 = 5. The nth term of an AP is given by the formula tn = a + (n - 1)d. To find the 10th term, substitute n = 10: t10 = 3 + (10 - 1) x 5 = 3 + 9 x 5 = 3 + 45 = 48. To find the 26th term, substitute n = 26: tRead more
In this arithmetic progression, the first term is a = 3 and the common difference is d = 8 – 3 = 5. The nth term of an AP is given by the formula tn = a + (n – 1)d. To find the 10th term, substitute n = 10: t10 = 3 + (10 – 1) x 5 = 3 + 9 x 5 = 3 + 45 = 48. To find the 26th term, substitute n = 26: t26 = 3 + (26 – 1) x 5 = 3 + 25 x 5 = 3 + 125 = 128. Thus, the terms are 48 and 128.
For more NCERT Solutions of Class 9 Ganita Manjari Chapter 8 Predicting What Comes Next: Exploring Sequences and Progressions Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-8/
See lessChoose the emotion displayed by the Grandfather. A. regretful B. apologetic C. nostalgic D. wistful
The correct answer is C. nostalgic. Grandpa feels nostalgic when he remembers his old house in town. He misses its peaceful surroundings, garden and especially the big mango tree. These memories remind him of the comfortable and familiar life he enjoyed there. His dislike of the noisy city and his lRead more
The correct answer is C. nostalgic. Grandpa feels nostalgic when he remembers his old house in town. He misses its peaceful surroundings, garden and especially the big mango tree. These memories remind him of the comfortable and familiar life he enjoyed there. His dislike of the noisy city and his longing for his old home clearly show his deep attachment to his past and familiar surroundings.
For more NCERT Solutions of Class 9 English Kaveri Chapter 4 Vitamin-M Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/english/kaveri-chapter-4/
See lessWhy do you think Grandpa gave Ravi a detective story book as a gift? What might this suggest about Grandpa’s awareness of Ravi’s actions earlier in the day?
Grandpa gave Ravi a detective story book because he seemed to know that Ravi had secretly followed him throughout the day. He told Ravi to learn how to avoid getting fooled while trailing a suspect. This was a playful hint about Ravi’s unsuccessful detective work. The twinkle in Grandpa’s eye also sRead more
Grandpa gave Ravi a detective story book because he seemed to know that Ravi had secretly followed him throughout the day. He told Ravi to learn how to avoid getting fooled while trailing a suspect. This was a playful hint about Ravi’s unsuccessful detective work. The twinkle in Grandpa’s eye also suggests that he was mischievously aware of what Ravi had done.
For more NCERT Solutions of Class 9 English Kaveri Chapter 4 Vitamin-M Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/english/kaveri-chapter-4/
See lessWhat might be the significance of Grandpa’s habit of giving gifts to everyone on his birthday rather than receiving them?
Grandpa’s habit of giving gifts to everyone on his birthday highlights his generous, affectionate and selfless nature. He continued to think of Ravi, his mother and father as his “babies” and wanted to make them happy. Instead of focusing on receiving gifts, he enjoyed giving them. This habit also sRead more
Grandpa’s habit of giving gifts to everyone on his birthday highlights his generous, affectionate and selfless nature. He continued to think of Ravi, his mother and father as his “babies” and wanted to make them happy. Instead of focusing on receiving gifts, he enjoyed giving them. This habit also shows his strong emotional connection with his family and his loving role within it.
For more NCERT Solutions of Class 9 English Kaveri Chapter 4 Vitamin-M Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/english/kaveri-chapter-4/
See less