A person has 2 parents, 4 grandparents, ...

A person has 2 parents, 4 grandparents, 8 great grandparents, and so on.Find the number of his ancestors during the ten generations preceding his own.

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The correct Answer is:

2046

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A man X has 7 friends, 4 of them are ladies and 3 are men. His wife Y also has 7 friends, 3 of them are ladies and 4 are men. Assume X and Y have no common friends. Then the total number of ways in which X and Y together can throw a party inviting 3 ladies and 3 men, so that 3 friends of each of X and Y are in the party, is :

A women selfhelp group (DWACRA) is supplied a rectangular solid (cuboid shape) of wax block with dimensions 66 cm , 42 cm, 21 cm , to prepare cylindrical candles each 4.2 cm in diameter and 2.8 cm of height . Find the number of candles prepared using this so solid .

150 workers were engaged to finish a piece of work in a certain number of days. Four workers dropped from the work on the second day. Four workers dropped on third day and so on. It took 8 more days to finish the work. Find the number of days in which the work was completed. [Let the no.of days to finish the work is 'r' then 150 x = (x+8)/2 [2 xx 150 + (x+8-1)(-4)]

In a human pyramid in a circus, the entire weight of the balanced group is supported by the legs of a performer who is lying on his back. The combined mass of all the persons performing the act, and the tables, plaques etc. involved is 280 kg. The mass of the performer lying on his back at the bottom of the pyramid is 60 kg. Each thighbone (femur) of this performer has a length of 50 cm and an effective radius of 2.0 cm. Determine the amount by which each thighbone gets compressed under the extra load. (g = 9.8 ms ^(-2)) Young's Modulus for bone Y=9.4xx 10 ^(9) Nm^(-2).

In a human pyramid in a circus, the entire weight of the balanced group is supported by the legs of a performer who is lying on his back. The combined mass of all the persons performing the act, and the tables, plaques etc. involved is 280 kg. The mass of the performer lying on his back at the bottom of the pyramid is 80 kg. Each thighbone (femur) of this performer has a length of 50 cm and an effective radius of 2.0 cm. Determine the amount by which each thighbone gets compressed under the extra load. (g=9.8 ms^(-2)) Young's Modulus for bone Y =9.4 xx 10 ^(9) Nm ^(-2)

An 80 kg man is riding on a 40 kg cart travelling at a speed of 2.5 m//s on a frictionless horizontal plane jumps off the cart, such that, his velocity just after is zero with respect to ground. The work done by him on th esystem during his jump is given as (A)/(4) KJ (Ain integer). Find the value of A.

Vijay had some bananas and he divided them into two lots A and B. He sold the first lot at the rate of Rs. 2 for 3 bananas and the second lot at the rate of Rs. 1 per banana, and got a total of Rs. 400. If he had sold the first lot at the rate of Rs. 1 per banana and the second lot at the rate of Rs. 4 for 5 bananas, his total collection would have been Rs. 460. Find the total number of bananas he had.

KUMAR PRAKASHAN-SEQUENCE AND SERIES-Testbook Illustrations for Practice Work

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Example 8 Insert 6 numbers between 3 and 24 such that the resulting se...
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Which term of the G.P., 2,8,32, ... up to n terms is 131072 ?
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In a GP the 3rd term is 24 and 6th term is 192. Find the 10th term.
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How many terms of the G.P.3,(3)/2,3/4 ..........are needed to give the...
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The sum of first three terms of a G.P. is 13/12 and their product is –...
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A person has 2 parents, 4 grandparents, 8 great grandparents, and so o...
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Find the sum to n terms of the series whose n^("th") term is n (n+3).
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If p^(th), q^(th), r^(th) and s^(th) terms of an A.P. are in G.P, the...
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If a, b, c are in G.P. and a^(1/x) =b^(1/y)=c^(1/z) , prove that x, y...
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If a, b, c, d and p are different real numbers such that (a^2 + b^2 + ...
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If p,q,r are in G.P. and the equations, px^(2) + 2qx + r = 0 and dx^2+...
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