# Squares and Square Roots

49. The sum of first 7 odd natural numbers is

• (A) 43
• (B) 59
• (C) 49
• (D) 64

48. Which of the following number would end with digit 0?

• (A) 1212
• (B) 1222
• (C) 1242
• (D) 1202

47. Which of the following number would end with digit 1?

• (A) 4512
• (B) 4522
• (C) 4532
• (D) 4542

46. Which of the following number would end with digit 4?

• (A) 3772
• (B) 3762
• (C) 3752
• (D) 3782

45. Which of the following number would end with digit 5?

• (A) 5672
• (B) 5682
• (C) 5652
• (D) 5612

44. Which of the following number would end with digit 6?

• (A) 6662
• (B) 6672
• (C) 6682
• (D) 6692

43. Which of the following number would end with digit 9?

• (A) 7982
• (B) 7962
• (C) 7992
• (D) 7932

42. Which of the following will have 1 at its units place?

• (A) 192
• (B) 172
• (C) 182
• (D) 162

41. The unit digit of 682 is

• (A) 8
• (B) 2
• (C) 4
• (D) 6

40. Which of the following is the square of an odd number?

• (A) 256
• (B) 361
• (C) 144
• (D) 400

39. The square of 0.4 is

• (A) 1.6
• (B) 0.106
• (C) 0.16
• (D) 0.016

38. The square of 6.1 is

• (A) 35.21
• (B) 36.21
• (C) 37.21
• (D) 37.31

37. Which of the following is a square of an even number?

• (A) 144
• (B) 169
• (C) 441
• (D) 625

36. A number ending in 9 will have the unit’s place of its square as

• (A) 3
• (B) 9
• (C) 1
• (D) 6

35. Which of the following will have 4 at the units place?

• (A) 142
• (B) 622
• (C) 272
• (D) 352

34. Which of the following cannot be a perfect square?

• (a) 841
• (b) 529
• (c) 198
• (d) All of the above

33. How many numbers are there, which when squared give the result 25?

• (A) 0
• (B) 1
• (C) 2
• (D) 3