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...? Mcqs

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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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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 Mason fixed black tiles of square shape around a square room. There are 21 tiles on each side of the room. How many tiles did he need altogether...?

(A) 88
(B) 76

(C) 80
(D) None of these

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What is 9/11 – 5/7...?

(A) 4/77
(B) 6/77

(C) 8/77
(D) None of these

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If Jack needs 2.5 pints of cream to make a dessert. How many pints will he need to make 3 desserts...?

(A) 7.5
(B) 6

(C) 5
(D) 3

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A and B have the same amount of money at first. After A gave B $50, B had 5 times as much money as A had left. How much do A and B have at first?...?

(A) 50$
(B) 75$

(C) None of these
(D) 70$

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A batsman in his 12th innings makes a score of 80 runs and there by increases his average score by 3. What is his average after the 12th innings...?

(A) 45
(B) 46

(C) 47
(D) None of these

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Complete the series: 4, 9,16, 25,...?

(A) 32
(B) 42

(C) 55
(D) 36

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A person buy a shirt in 470 and sold in 540 find the approximate profit percentage...?

(A) 11%
(B) 12%

(C) 13%
(D) 15%

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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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