Practice30Create account

Add all the prime numbers in the yellow part of the strip. What is the sum?

Class 6Prime and Composite NumbersPlaying with Numbers
  • A120
  • B141
  • C159
  • D97

Step-by-Step Solution

Yellow cells run from 21 to 39. Primes there: 23, 29, 31, 37. Sum . (21 and 39 are multiples of 3; 19 and 41 are outside the yellow part.)
Answer: A) 120

Master this chapter in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Prime and Composite Numbers practice questions

More Class 6 Prime and Composite Numbers practice

Sonal crossed out 1 and every multiple of 2, 3 and 5 except 2, 3 and 5 themselves. One…Which of the following is a prime number?Which number is the only even prime number?Two prime numbers whose difference is 1 are called consecutive primes if both are prime.…Twin primes are pairs of primes that differ by 2 (like 3 and 5). Which pair below is a…