Find the greatest 3-digit number which is common multiple of 6,15 and 21.

Find the greatest 3-digit number which is divisible by 16,18 and 24.

Find the greatest 4-digit number which is a perfect square.

Find the greatest 4-digit number which is a perfect square.

Find the smallest 3 digit number which is the multiple of 6. Find the sum of all the three digit numbers which are the multiple of six.

Find the greatest 4-digit number which is divisible by 15, 24 and 36.

Find the greatest 4 -digit number which is a perfect square.

Find the greatest four digit number which is a perfect square

Find the greatest five digit number which is a perfect square.

Find the sum of all 3 digit numbers which are multiple of 5.