Children especially in western countries who receive very little sunshine suffer from

A box consist of 5 rupees, 2 rupees and 1 rupee coins and their value are in the ratio of 15 : 4 : 2 respectively. If there are total 112 coins, then how many 2 rupees coins are there in the box?

Choose the right image when mirror is placed on the line AB?

In the following question, by using which mathematical operators will the expression become correct?
15 _ 3 _ 4 _ 20

If secA + tanA = x, then the value of x is

If + means ÷ , ÷ means ­- , ­- means x and x means + , what will be the value of the following expression:

8 + 4 ÷ 3 x 5 ­ 9 = ?

Select the related number from the given alternatives.
12.5 : 6.25 :: 7 : ?

The areas of two similar triangles ΔABC and ΔPQR are 36 sq cms and 9 sq cms respectively. If PQ = 4 cm then what is the length of AB (in cm)?