A square is drawn by joining the mid points of the sides of a given square in the same way and this process continues indefinitely. If a side of the first square is 4 cm, determine the sum of the areas all the square.
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If k, 2k – 1 and 2k + 1 are three consecutive terms of an AP, the value of k is
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2
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The sum of first five multiples of 3 is:
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3
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Find the 15th term of the sequence 20, 15, 10 . . . . .
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4
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Two A.P.’s have the same common difference. The first term of one of these is 8 and that of the other is 3. The difference between their 30th terms is
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5
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The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?
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6
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The 7th and 12th term of an arithmetic progression are -15 and 5 respectively. What is the 16th term?
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7
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How many 2-digit positive integers are divisible by 4 or 9?
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8
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How many terms are there in the GP 5, 20, 80, 320........... 20480?
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9
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What is the sum of the first 12 terms of an arithmetic progression if the first term is -19 and last term is 36?
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10
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If a + 1, 2a + 1, 4a - 1 are in A.P., then the value of a is:
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