Question
A rectangular frame of size 120 cm (length) x  140 cm
(breadth) is to be surrounded by stickers of 2 cm x 2 cm size. How many stickers would be required for such decoration?Solution
Perimeter of the frame = 2(120 + 140) cm = 2 × 260 = 520cm ∴ No. of stickers = 520/2 + 4 (4 extra stickers would be required for four corners) ∴ 260 + 4 = 264
169, 224, 293, 385, 497, 629
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20, 33, 50, 69, 93, 121
25Â Â Â 26Â Â Â Â 28Â Â Â Â 32Â Â Â Â 42Â Â Â Â 56
Find the wrong number in the given number series.
8, 12, 23, 40, 66, 103
8137, 5405, 3669, 2701, 2201, 1997
Find the wrong number in the given number series.
78, 66, 51, 39, 20, 12
2824Â Â Â Â 2314Â Â Â Â Â 1973Â Â Â Â 1759Â Â Â Â 1634Â Â Â Â 1574
In each of the following number series, one term is wrong. Find the wrong term.
3, 7, 13, 21, 31, 42, 57
Find the wrong term in the given series below.
2847, 2954, 2799, 3088, 2727, 3256
Find the wrong number in the given number series.
2, 5, 10, 17, 26, 38, 50