## 11. What is the sum of all two digit numbers that gives a remainder of 3 when they are divided by 7?

## 12. The remainder , when (15^{23} + 23^{23}) is divided by 19, is

^{23}+ 23

^{23}) is divided by 19, is

## 13. A heap of pebbles when made up into group of 32, 40, 72, leaves the remainder 10, 18 and 50 respectively. Find least number of pebbles in the heaps.

## 14. The sum of two numbers is 684 and their HCF is 57. Find all possible pairs of such numbers.

## 15. Two numbers are in the ratio 3 : 4. If their LCM is 240, the smaller of two number is

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