Latest Others Aptitude Question SOLUTION: In how many ways can 4 letters be posted in 2 post boxes, if any number of letters can be posted in all of the two post boxes?

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Challenger of the Day

Deep Narayan Mojumder
Deep Narayan Mojumder
India
West Bengal
Time: 00:01:02
Points
19

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User Comments

1 + 9 + 24 + 46 + ... Find the sum of sequence

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Maths Quotes

The more you know, the less sure you are

Voltaire

Everything in nature adheres to the cone, the cylinder and the cube.

Paul Cezanne

Mathematical proofs, like diamonds, are hard and clear, and will be touched with nothing but strict reasoning.

John Locke

THE ESSENCE OF MATHEMATICS IS NOT TO MAKE SIMPLE THINGS DIFFICULT BUT TO MAKE DIFFICULT THINGS SIMPLE.

anne.11

Placement Questions

O and O’ are centers of the two circles with radii 7cm and 9cm respectively. The distance between the centers is 20cm. If PQ is the transverse common tangent to the circles which cuts OO’ at X, what is the length of O’X in cm?

a. 35/4

b. 45/4

c. 10

d. 11

Unsolved Asked In: Elitmus

A woman is walking down a downward-moving escalator and steps down 10steps to reach the bottom. Just as she reaches the bottom of the escalator, a sale commences on the floor above. She runs back up the downward moving escalator at a speed five times that which she walked down. She covers 25 steps in reaching the top. How many steps are visible on the escalator when it is switched off?

Unsolved Asked In: Book

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