If the mean of 7 terms is 40, the sum of those terms will be...? Mcqs

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If the mean of 7 terms is 40, the sum of those terms will be...?

(A) 280
(B) 480

(C) 200
(D) 346

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A can do a piece of work in 4 days and B can do it in 12 days. In how many days will they finish the work, both working together...?

(A) 4 days
(B) 2 days

(C) 3 days
(D) 6 days

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A is two years older than B who is twice as old as C. If the sum of the ages of A, B and C is 27, how old is B...?

(A) 9
(B) 10

(C) 11
(D) 12

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If a person reads 3/8 of a book in a day. Next day he reads 4/5 of the rest. Now 40 pages are left. How many pages are there in book...?

(A) 240
(B) 320

(C) 360
(D) 380

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If a= √5-1//5+1 and b= √5+1/√5-1, Find a + b...?

(A) 2
(B) 4

(C) 6
(D) 8

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The number of boys and girls in a school at 360 and 240 respectively. What is the ratio of number of boys to total students...?

(A) 3:5
(B) 2:5

(C) 1:5
(D) 2:3

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Solve: square root 13 and 13 power is 4...?

(A) 520
(B) 169

(C) 220
(D) 340

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Find the average of 5/6, 4/3, 3/4?...?

(A) 35/36
(B) 38/37

(C) 1
(D) 6/5

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ax+2y=5, 3x-6y=20 in the system of equations above, a is a constant. if the system has one solution, which of the following cannot be the value of a...?

(A) -1
(B) 4

(C) 1
(D) -3

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For what value of x+1/4√x +a² will be perfect square:...?

(A) ±1/18
(B) ±1/8

(C) 1/5
(D) 1/4

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