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There are total 36 persons. 9 persons take Tea but not coffee (it means only tea) Total persons who take tea (only Tea + both tea and coffee) = 16. So, persons who take both coffee and tea = 16- 9=7. So, persons who take coffee but not tea (only coffee) = total - only tea - both tea and coffee =36-9-7= 20
Find the unit digit of (57 129 - 7).
What number should be deducted from 699 so that the resulting value, when divided by 7, 9, and 11, gives a remainder of 3 in each case?
Find the number of even numbers between 12 and 30.
Sum of squares of three consecutive numbers is 1589. Find the sum of first and third number.
Find the unit digit in (257)45 × (248)73.
Which of the following is the greatest number that divides 72 and 119 and leaves 3 and 4 as respective remainders?
