Ashu had 24 pages to write. By the evening, he had completed 25% of his work. How many pages were left? 2. A lawyer willed his 3 sons Rs 250000 to be divided into portions 30%, 45% and 25%. How much did each of them inherit? 3.Mr Virmani purchased a house for Rs 365000 and spent Rs 135000 on its repairs. If he sold it for Rs 550000, find his gain percent. 4.A business man makes a 10% profit by selling a toy costing him Rs 120. What is the selling price? 5.Reema took a loan of Rs 8000 from a money lender, who charged interest at the rate of 18% per annum. After 2 years, Reema paid him Rs 10400 and wrist watch to clear the debt. What is the price of the watch? 6.Write the following using numbers, literals and signs of basic operations. State what each letter represents: (i) The diameter of a circle is twice its radius. (ii) The area of a rectangle is the product of its length and breadth.
(iii) The selling price equals the sum of the cost price and the profit.
(iv) The total amount equals the sum of the principal and the interest.
(v) The perimeter of a rectangle is two times the sum of its length and breadth. (vi) The perimeter of a square is four times its side. 7. Write the following using and signs of basic operations:
(i) The sum of 6 and x.
(ii) 8 more than a number y.
(iii) One-third of a number x.
(iv) One-half of the sum of number x and y.
(v) Number y less than a number 7
(vi) 7 taken away from x.
(vii) 2 less than the quotient of x and y. (viii) 4 times x taken away from one-third of y.
(ix) Quotient of x by 3 is multiplied by y. 8.Solve and check:
(a) x – 5 = 7 (b) 8 + x = 3
(c) x = 18 (d) 3x + 5 = 13 – x (e) 2x – = 3 (f) 3(2-5x) – 2(1-6x) =1 (g) – = – 2 (h) 5x – 3 = x + 17 (i) 3(x + 6) = 24 (j) 6x + 5 = 2 x + 17 9. If a = 2, b = 3 find the value of (a) a + b (b) 5a2 – 2ab (c) a – b (d) a2 + ab 10. If p = –2, q = 1 and r = 3 find the value of (a) p2 + q2 – r2 (b) p – q – r (c) p3 + q3 + r3 + 3pqr 11. Identify the monomials, binomials, trinomials and quadrinomials in the following:- (a) –xyz (b) xy + yz + zx (c) 2x + 1+4x (d) ax3 + bx2 + cx + d (e) –14 (f) 5 + 7x3y3z3 12. Add the following:- (a) 3x, 7x (b) 7y , –9y (c) x – 3y – 2z, 5x + 7y – z (d) –2m2 + 6m – 6, –m2 – 2m – 7, m2 – 4m + 5 (e) 2x2 – 3xy + y2, –7x2 – 5xy – 2y2, 4x2 + xy – 6y2 13. Subtract the following:- (a) 5x from 2x (b) a2 – b2 from b2 – a2 (c) 5a + 7b – 2c from 3a – 7b + 4c (d) 6x3 – 7x2 + 5x – 3 from 4 – 5x + 6x2 – 8x3 (e) –2a + b + 6d from 5a – 2b – 3c 14. Find the area of the square whose perimeter is 440 cm. 15. The area of a square field is 100 sq.m. Find its perimeter. 16.The areas of a square and rectangle are equal. If the side of the square is 20 cm and the breadth of the rectangle 10 cm, find the length of the rectangle and its perimeter. 17.A wire in the shape of rectangle whose width is 22 cm is bent to form a square of side 31 cm. Find the length of the rectangle. Also, find which shape encloses more area.
Answers
Answered by
2
Answer:
Step-by-step explanation:
Correct option is A)
Total pages is 24
Pages completed 25%
Pages left is 25% of 24 =
100
25
×24=
4
1
×24
=6 pages
Pages read is 6
Pages left is 24−6=18 pages
Similar questions