Count the total number of black diamonds in the given pattern. [Figure: see page 5 of source PDF]

A water tank of dimensions 20 cm x 5 cm x 10 cm has 307 cc water in it. A few bricks, each of dimensions 5 cm x 2 cm x 1 cm are fully submerged in the tank. Each brick absorbs 30% of its own volume of water. Just enough bricks are put in, such that the water level rises to comple…

How many pages of size 21 cm x 25 cm can be made from a roll of 48 m x 1.2 m paper? Assume the pages are perfectly cut edge to edge.

At most how many spheres of the same size can be placed around a same size sphere at the centre so that they all simultaneously touch the sphere at the centre?

How many tree trunks are there in the given figure? [Figure: see page 5 of source PDF]

It is 12 o’clock, and the hour and minute hands are aligned exactly one over the other. Both hands move continuously. After how many minutes will they meet again?

Shown below is a quadrant of a disc with cut-outs. Find the total number of cut-outs in the complete disc. [Figure: see page 6 of source PDF]

There are some men and some women in a group. Each person shakes hands with exactly one other person in the entire group. After this round of handshakes, eight men and four women find that they shook hands with someone of the same sex. The total number of handshakes exchanged in…

Count the number of people in this picture who are wearing spectacles. [Figure: see page 6 of source PDF]