Question

1. Write five pairs of prime numbers less than 20 whose sum is divisible by
2. Write all the numbers less than 100 which are common multiples of 3 a
3. A number is divisible by both 5 and 12. By which other number will that
divisible?
4. Two tankers contain 850 litres and 680 litres of kerosene oil respecti
capacity of a container which can measure the kerosene oil of both th
exact number of times.
5. The traffic lights at three different road crossings change after every
108 seconds respectively. If they change simultaneously at 7 a.m., at

Answer 1

Answer:

1.2,3,5,7,11,13,17,19