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# Placement Questions & Answers :: TCS

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Not Attempted

351. Apples cost L rupees per kilogram for the first 30 kilograms and Q per kilogram for each additional kilogram. If the price paid for 33 kilograms of Apples is Rs.1167 and for 36 kilograms of apples if Rs.1284, then the cost of the first 10 kgs of apples is:

Explanation:

By question
30L + 3Q = 1167 ------ (1)
30L + 6Q = 1284 -------(2)
By solving eq. (1) & (2)
Q = 39, L = 35
So, cost of first 10 kgs of apples = 35 * 10 = Rs. 350

Tags: TCS

Not Attempted

352. A and B can do a piece of work in 40 days. Thier skills of doing the work are in the ratio 8:5. how many days will A take to engage alone ?

Explanation:

Ratio of efficiency of A:B=8:5
Total Efficiency=13
They complete the work in 40 days
When the efficiency of A is 8
A could complete the work in (40/8)*13=65 days
Thus. A alone can do the work in 65 days

Tags: TCS

Not Attempted

353. A number increased 37 1/2% gives 33. So, the number is

Explanation:

Let x be that number
x+(37 1/2 % of x)=33
x+3x/8=33
11x=33*8
x=33*8/11=24

Tags: TCS

Not Attempted

354. Smallest no which when multiplied by 12748 gives a perfect square is

Explanation:

Here is no explanation for this answer

Tags: TCS

Not Attempted

355. what is the unit digit of(2^3)^123456

Explanation:

(2^3)^123456=2^370368
Take unit position of power
2^8=256
so unit position is 6

Tags: TCS

Not Attempted

356. Jake and paul start together to walk 10kms jake walks 1.5kmph faster than paul and arrives at his destination 1.5 hours earlier than paul jakes speed walking is

Explanation:

Let speed of jake = x kmph.
So, speed of paul = ( x - 1.5 ) kmph.
Time difference =1.5hours
Total Distance = 10km
10/(x-1.5) -10/x = 1.5
By solving the above eq.
x = 4 kmph

Tags: TCS

Not Attempted

357. Find the number of zeros in the expression 15*32*25*22*40*75*98*112*125.

Explanation:

Expen 15*32*25*22*40*75*98*112*125 as below
(3*5)*(2^5)*(5^2)*(11*2)*(5*2^3)*(3*5^2)*(49*2)*(7*2^4)*(5^3)
Total no. of 5 = 9 & n.o of 2=14
So, Total number of zero = 9

Tags: TCS

Not Attempted

358. If a^x= b , b^y= c and c^z = a , then what is the value of x*y*z ?

Explanation:

((((a)^x)^y)^z)=a
so.(a)^xyz=a
so xyz=1

Tags: TCS

Not Attempted

359. In how many ways a team of 11 must be selected a team 5 men and 11 women such that the team must comprise of not more than 3 men.

Explanation:

Here is no explanation for this answer

Tags: TCS

Not Attempted

360. How many liters of a 90% of concentrated acid needs to be mixed with a 75% solution of concentrated acid to get a 30 liter solution of 78% concentrated acid?