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Science & Math for K6 - K12 Students

Simple Equations
Exercise-I
 1. The sum of two numbers is 100 and their difference is 37. The largest number is a) 67.5 b) 69.5 c) 68.5 d) 65.5

 2. The difference of two numbers is 5 and the difference of their squares is 135. The sum of the numbers is a) 25 b) 27 c) 31 d) 30

 3. The difference of two numbers is 8 and of their sum is 35. The numbers are a) 128, 136 b) 124, 132 c) 136, 144 d) 132, 140

 4. Three fourth of four fifth of a number is 120. The number is a) 300 b) 400 c) 250 d) 200

 5. 24 is divided into two parts such that 7 times the first part added to 5 times the second part makes 146. The 2nd part is a) 12 b) 11 c) 13 d) 10

 6. A positive number when decreased by 4, is equal to 21 times the reciprocal of the number. The number is a) 3 b) 5 c) 7 d) 9

 7. The sum of two numbers is twice their difference. If one of the number is 10, the other number is a) b) 30 c) d)

 8. The product of two numbers is 120. The sum of their squares is 289. The sum of the two numbers is a) 10 b) 23 c) 69 d) 70

 9. A number whose fifth part increased by 5 is equal to its 4th part diminished by 5 is a) 160 b) 180 c) 200 d) 220

 10. A certain number of two digits is 3 times the sum of its digits and if 45 is added to it, the digits are reversed. The number is a) 32 b) 72 c) 27 d) 23

 11. Three numbers are in the ratio 3 : 4 : 5. The sum of the largest and the smallest equals the sum of third and 52. The smallest number is a) 13 b) 26 c) 39 d) 52

 12. If then x = a) 9 b) 8 c) 12 d) 10

 13. Of the three numbers, the first is twice the second and is half of the third. If the average of three numbers is 56, the smallest number is a) 24 b) 48 c) 40 d) 36

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