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67, 61, p, q, r, s, 41 is an arrangement of prime numbers in decreasing order. Among the following, which one represents the number 53?
(a)
s
(b)
r
(c)
q
(d)
p

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Important Questions on Number Systems
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1 USD = Rs. 67.89. A money changer adds a margin of Rs. 1.11. What will be the cost of 150 USD ?
1. Rs. 10,183
2. Rs. 10,350
3. Rs. 10,330
4. Rs. 10,450

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The sum of three consecutive numbers is . Find the highest number-
1.
2.
3.
4.

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Find such number, so that one fourth of the number is more than :

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If is integer, is natural number then

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Twice the difference between two numbers is equal to their sum. If one number is , Find the other number.
1.
2.
3.
4.

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How many times does the number occur in unit's place for numbers ranging from to ?
1.
2.
3.
4.

