‘Idli’ is said 300 times, ‘vada’ 180 times, and ‘idli-vada’ 60 times. These counts correspond to multiples of 3, 5, and both 3 and 5 (LCM 15) up to 900.
Class 6 Mathematics Ganita Prakash Prime Time
Class 6 Mathematics Chapter 5 Prime Time question answer
When playing till 900, ‘idli’ is called for multiples of 3, occurring 300 times (3 × 300 = 900). ‘Vada’ corresponds to multiples of 5, occurring 180 times (5 × 180 = 900). For ‘idli-vada,’ said for multiples of both 3 and 5 (LCM 15), there are 60 instances (15 × 60 = 900). The overlaps ensure no double counting, and the counts follow the divisibility rules for these multiples within the range.
For more NCERT Solutions for Class 6 Math Chapter 5 Prime Time Extra Questions and Answer:
https://www.tiwariacademy.com/ncert-solutions-class-6-maths-ganita-prakash-chapter-5/