Direction : What value should come in the place of question mark (?) in the following questions?

1798 ÷ 31 × ? = 348

Which smallest number should be subtracted from 1000 so that results will be a perfect square? 

The total cost of 18 pens and 23 pencils is Rs. 231, while the total cost of 7 pens and 13 pencils is Rs. 102. What is the cost of 4 pens and 9 pencils?

How many two-digit numbers are divisible by 3 but not by 7?

Direction : What should come in place of the question (?) in the following question.

23.56 + 134.44+ 4142.25=?

A number divided by 13 leaves a remainder 1 and if the quotient, thus obtained, is divided by 5, we get a remainder of 3. What will be the remainder if the number is divided by 65?

The median of 31, 25, 17, 23, 45 and 59 is:

A number when divided by the sum of 555 and 445 gives two times their difference as quotient and 30 as the remainder. The number is: