A positive number when decreased by 4 becomes 21 times its reciprocal. The number is ______...? Mcqs

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A positive number when decreased by 4 becomes 21 times its reciprocal. The number is ______...?

(A) 5
(B) 6

(C) 7
(D) 8

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David obtained 76, 65, 82, 67 and 85 marks [out of 100] in English, Mathematics, Physics, Chemistry and Biology. What are his average marks...?

(A) 65
(B) 68

(C) 75
(D) None of these

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The sum of the angles in a triangle is ...?

(A) 360 Degree
(B) 190 Degree

(C) 180 Degree
(D) 280 Degree

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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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If the radius of circle is increased by 2% then what is the increased in percentage area...?

(A) 100/121
(B) 97/25

(C) 101/25
(D) None of these

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The radius of a circle is 10 cm and the length of one of its chords is 12 cm then the distance of the chord from the centre is...?

(A) 6 cm
(B) 8 cm

(C) 10 cm
(D) 12 cm

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A sum of money becomes doubles in 3 years at compound interest, compounded annually at the same rate. In how many years it will become 4 times of itself...?

(A) 5 years
(B) 6 years

(C) 7.5 years
(D) 12 years

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An observer 1. 6m tall is 20√3m away from a tower The angle of elevation from his eye to the top of the tower is 30 deg The height of the tower is:...?

(A) 21,6 m
(B) 24,72 m

(C) 23,2 m
(D) None of these

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If you pay $2290 for a DVD that includes a 7% sales tax, what is the price of the DVD before the sales tax...?

(A) $23
(B) $21.40

(C) $25
(D) $20.50

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The ratio 35: 84 in simplest form is:...?

(A) 5:7
(B) 7:12

(C) 5:12
(D) None of these

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