Numbers

 Numbers Worksheet-16 

1. The operation 'of stands for ___

(a) +                    (b) –                    (c) +                    (d) ×

2. 10⁸ is expanded by writing ____ number of zeros after 1.

(a) 8                    (b) 0                    (c) 10                  (d) none

Numbers Worksheet-17

1. Temperature at the foot of a moun­tain is +5°C. It fell down by 10°C at the top of the mountain. The tem­perature recorded on the top is

(a) +15°C           (b) –15°C           (c) + 5°C            (d) –5°C

2. The value of (–2)⁷ is

(a) +64               (b) –64               (c) –128             (d) –14

Numbers Worksheet-18

1. Observer the following pattern for obtaining the sums, then find the sum of numbers from 781 to 790?

1 + 2 + 3 + 4 + 5 + 6 +7 + 8 + 9 + 10 = 55

11 + 12 + 13 + 14 + 15 + 16 + 17 + 18 + 19 + 20 = 155

21 + 22 + 23 + 24 + 25 + 26 + 27 + 28 + 29 + 30 = 255

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51 + 52 + 53 + 54 + 55 + 56 + 57 + 58 + 59 + 60 = 555

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101 + 102 + 103 + 104 + 105 + 106 + 107 + 108 + 109 + 110 = 1055

251 + 252 + 253 + 254 + 255 + 256 + 257 + 258 + 259 + 260 = 2555