Competive Exam Math 6
Q. Use the cuboid PQRSTUVW to answer Questions 1 - 5
Solutions / āϏāĻŽāĻžāϧāĻžāύ
1. Face PQRS is parallel to ________. (PQRS āĻŽā§āĻāĻāύ ________-ā§° āϏāĻŽāĻžāύā§āϤ⧰āĻžāϞāĨ¤)
Ans / āĻāϤā§āϤ⧰: TUVW
2. PSWT is parallel to ________. (PSWT āĻŽā§āĻāĻāύ ________-ā§° āϏāĻŽāĻžāύā§āϤ⧰āĻžāϞāĨ¤)
Ans / āĻāϤā§āϤ⧰: QRUV
3. ________ is parallel to PQUT. (PQUT-ā§° āϏāĻŽāĻžāύā§āϤ⧰āĻžāϞ āĻŽā§āĻāĻāύ āĻšā§āĻā§ ________āĨ¤)
Ans / āĻāϤā§āϤ⧰: TUVW
4. PSWT is perpendicular to ________. (PSWT āĻŽā§āĻāĻāύ ________-ā§° āϞāĻŽā§āĻŦāĨ¤)
Ans / āĻāϤā§āϤ⧰: QRUV
5. PQUT is perpendicular to ________. PQUT āĻŽā§āĻāĻāύ ________-ā§° āϞāĻŽā§āĻŦāĨ¤
Ans / āĻāϤā§āϤ⧰: TUVW
6. A triangle with three unequal sides is called ________. (āϤāĻŋāύāĻŋāĻāĻāĻž āĻŦāĻžāĻšā§ āĻ āϏāĻŽāĻžāύ āĻĨāĻāĻž āϤā§ā§°āĻŋāĻā§āĻāĻ āĻāĻŋ āĻŦā§āϞāĻž āĻšāϝāĻŧ ?)
(a) Right-angled Triangle | (b) Scalene Triangle | (c) Isosceles Triangle
Ans / āĻāϤā§āϤ⧰: (b) Scalene Triangle
Explanation: A scalene triangle has all three sides of different lengths. āĻŦā§āϝāĻžāĻā§āϝāĻž: Scalene triangle-ā§° āϤāĻŋāύāĻŋāĻāĻāĻž āĻŦāĻžāĻšā§ā§° āĻĻā§ā§°ā§āĻā§āϝ āĻŦā§āϞā§āĻ āĻŦā§āϞā§āĻ āĻšāϝāĻŧāĨ¤
7. The sum of the three angles of a triangle is ________. āĻāĻāĻž āϤā§ā§°āĻŋāĻā§āĻā§° āϤāĻŋāύāĻŋāĻāĻž āĻā§āĻŖā§° āϝā§āĻāĻĢāϞ āĻāĻŋāĻŽāĻžāύ?
(a) 360° | (b) 180° | (c) 260°
Ans / āĻāϤā§āϤ⧰: (b) 180°
Explanation: The sum of the interior angles of every triangle is 180°. āĻŦā§āϝāĻžāĻā§āϝāĻž: āĻĒā§ā§°āϤāĻŋāĻā§ āϤā§ā§°āĻŋāĻā§āĻā§° āĻāĻŋāϤ⧰⧰ āϤāĻŋāύāĻŋāĻāĻž āĻā§āĻŖā§° āϝā§āĻāĻĢāϞ ā§§ā§Žā§Ļ°āĨ¤
Data / āϤāĻĨā§āϝ: 7, 5, 2, 9, 5, 8
Arrange in ascending order / āĻā§°ā§āϧā§āĻŦāĻā§ā§°āĻŽāϤ āϏāĻžāĻāĻŋāϞā§: 2, 5, 5, 7, 8, 9
8. Mean (Average) / āĻāĻĄāĻŧ : 7 + 5 + 2 + 9 + 5 + 8 / 6 = 36 / 6 =
Ans / āĻāϤā§āϤ⧰: 6
9. Mode / āĻŦāĻšā§āϞāĻ
Answer / āĻāϤā§āϤ⧰: 5
Explanation: The number 5 appears most frequently. āĻŦā§āϝāĻžāĻā§āϝāĻž: ā§Ģ āϏāĻāĻā§āϝāĻžāĻā§ āϏ⧰ā§āĻŦāĻžāϧāĻŋāĻāĻŦāĻžā§° āĻĻā§āĻāĻž āϝāĻžāϝāĻŧāĨ¤
10. Median / āĻŽāϧā§āϝāĻ
Since there are 6 numbers, Median = Average of the 3rd and 4th numbers.
5 + 7 / 2 = 6
Ans / āĻāϤā§āϤ⧰: 6
Explanation: The correct median is 6, not 5.7 or 12. āĻŦā§āϝāĻžāĻā§āϝāĻž: āϏāĻ āĻŋāĻ Median = ā§ŦāĨ¤
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11. The remainder when -76 is divided by 3 is: (-76 āĻ 3 ā§°ā§ āĻšā§°āĻŖ āĻā§°āĻŋāϞ⧠āĻĒā§ā§°āĻžāĻĒā§āϤ āĻāĻžāĻāĻļā§āώ āĻšā§āĻā§:)
Trick:
- Ignore the negative sign first (āĻĒā§ā§°āĻĨāĻŽā§ − āĻāĻŋāĻšā§āύ āĻāĻāϤ⧰āĻžāĻ āϞāĻāĻāĨ¤): 76 ÷ 3 → remainder(āĻāĻžāĻāĻļā§āώ) = 1
- For negative numbers (āĻāĻŖāĻžāϤā§āĻŽāĻ āϏāĻāĻā§āϝāĻžā§° āĻŦāĻžāĻŦā§ -):
- Remainder = Divisor − Positive remainder (āĻāĻžāĻāĻļā§āώ = āĻšā§°āĻŖāĻāĻžā§°ā§ āϏāĻāĻā§āϝāĻž − āϧāύāĻžāϤā§āĻŽāĻ āĻāĻžāĻāĻļā§āώ) = 3 - 1 = 2
Ans / āĻāϤā§āϤ⧰: (C) 2
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Practice Set: Remainder (āĻāĻžāĻāĻļā§āώ)
Q1. The remainder when -25 is divided by 4 is: (Q1. -25 āĻ 4 ā§°ā§ āĻšā§°āĻŖ āĻā§°āĻŋāϞ⧠āĻĒā§ā§°āĻžāĻĒā§āϤ āĻāĻžāĻāĻļā§āώ āĻšā§āĻā§:)
(A) -1 (B) 1 (C) 2 (D) 3
Q2. The remainder when -45 is divided by 7 is: (Q2. -45 āĻ 7 ā§°ā§ āĻšā§°āĻŖ āĻā§°āĻŋāϞ⧠āĻĒā§ā§°āĻžāĻĒā§āϤ āĻāĻžāĻāĻļā§āώ āĻšā§āĻā§:)
(A) 4 (B) 5 (C) 6 (D) -3
Q3. The remainder when -81 is divided by 5 is: (Q3. -81 āĻ 5 ā§°ā§ āĻšā§°āĻŖ āĻā§°āĻŋāϞ⧠āĻĒā§ā§°āĻžāĻĒā§āϤ āĻāĻžāĻāĻļā§āώ āĻšā§āĻā§:)
(A) 1 (B) 2 (C) 4 (D) -1
Q4. The remainder when -100 is divided by 6 is: (Q4. -100 āĻ 6 ā§°ā§ āĻšā§°āĻŖ āĻā§°āĻŋāϞ⧠āĻĒā§ā§°āĻžāĻĒā§āϤ āĻāĻžāĻāĻļā§āώ āĻšā§āĻā§:)
(A) 2 (B) 4 (C) 5 (D) -2
Q5. The remainder when -67 is divided by 8 is: (Q5. -67 āĻ 8 ā§°ā§ āĻšā§°āĻŖ āĻā§°āĻŋāϞ⧠āĻĒā§ā§°āĻžāĻĒā§āϤ āĻāĻžāĻāĻļā§āώ āĻšā§āĻā§:)
(A) 1 (B) 3 (C) 5 (D) 7
Shortcut Trick / āϏāĻšāĻ āĻā§ā§°āĻŋāĻ
For negative numbers: Remainder = Divisor − Positive remainder (āĻāĻŖāĻžāϤā§āĻŽāĻ āϏāĻāĻā§āϝāĻžā§° āĻŦāĻžāĻŦā§: āĻāĻžāĻāĻļā§āώ = āĻšā§°āĻŖāĻāĻžā§°ā§ āϏāĻāĻā§āϝāĻž − āϧāύāĻžāϤā§āĻŽāĻ āĻāĻžāĻāĻļā§āώ )