# 8th Standard Important Questions

**what is resources?**

(class:
8th Std
)
Social Studies

**Write:(i) The rational number that does not have a reciprocal.(ii) The rational numbers that are equal to their reciprocals.(iii) The rational number that is equal to its negative.**

(class:
8th std
)
Mathematics

**Fill in the blanks. (i) Zero has __________ reciprocal.**

(class:
8th std
)
Mathematics

**Fill in the blanks.(ii) The numbers __________ and __________ are their own reciprocals**

(class:
8th std
)
Mathematics

**Fill in the blanks.(iii) The reciprocal of - 5 is __________.**

(class:
8th std
)
Mathematics

**Fill in the blanks.(v) The product of two rational numbers is always a __________.**

(class:
8th std
)
Mathematics

**Fill in the blanks.(vi) The reciprocal of a positive rational number is __________.**

(class:
8th std
)
Mathematics

**Write five rational numbers which are smaller than 2.**

(class:
8th std
)
Mathematics

**Write five rational numbers greater than - 2.**

(class:
8th std
)
Mathematics

**Solve: y + 3 = 10**

(class:
8th std
)
Mathematics

**Solve: 17 + 6p = 9**

(class:
8th std
)
Mathematics

**Solve: 14y - 8 = 13**

(class:
8th std
)
Mathematics

**Solve:6x = 12**

(class:
8th std
)
Mathematics

**Solve: x 2 = 7**

(class:
8th std
)
Mathematics

**Solve:7x 9 = 16**

(class:
8th std
)
Mathematics

**Solve:6 = z + 2**

(class:
8th std
)
Mathematics

**If you subtract 1/2 from a number and multiply the result by 1/2, you get 1/8. What is the number? **

(class:
8th std
)
Mathematics

**Three consecutive integers are such that when they are taken in increasing order and multiplied by 2, 3, and 4 respectively, they add up to 74. Find these numbers.**

(class:
8th std
)
Mathematics

**The sum of three consecutive multiples of 8 is 888. Find the multiples.**

(class:
8th std
)
Mathematics

**Three consecutive integers add up to 51. What are these integers? **

(class:
8th std
)
Mathematics

**Two numbers are in the ratio 5 : 3. If they differ by 18, what are the numbers?**

(class:
8th std
)
Mathematics

**Sum of two numbers is 95. If one exceeds the other by 15, find the numbers**

(class:
8th std
)
Mathematics

**The base of an isosceles triangle is 4/3 cm. The perimeter of the triangle is 42/15 cm. What is the length of either of the remaining equal sides?**

(class:
8th std
)
Mathematics

**The perimeter of a rectangular swimming pool is 154 m. Its length is 2m more than twice its breadth. What are the length and breadth of the pool? **

(class:
8th std
)
Mathematics

**Find the common factors of the terms: (i) 12x, 36 (ii) 2y, 22xy (iii) 14pq, 28p2q2 (iv) 2x, 3x2, 4 (v) 6abc, 24ab2, 12a2b (vi) 16x3, -4x2, 32x (vii) 10pq, 20qr, 30rp (viii) 3x2y3, 10x3y2, 6x2y2z**

(class:
8th std
)
Mathematics

**Factorise the following expressions: (i) 7x - 42 (ii) 6p - 12q (iii) 7a2 + 14a (iv) -16z + 20z3 (v) 20l2m + 30 alm (vi) 5x2y - 15xy2 (vii) 10a2 - 15b2 + 20c2 (viii) -4a2 + 4ab - 4 ca (ix) x2yz + xy2z + xyz2 (x) ax2y + bxy2 + cxyz**

(class:
8th std
)
Mathematics

**Factorise: (i) x2 + xy + 8x + 8y (ii) 15xy - 6x + 5y - 2 (iii) ax + bx - ay - by (iv) 15pq + 15 + 9q + 25p (v) z - 7 + 7xy - xyz**

(class:
8th std
)
Mathematics

**Which of the following statements is correct?(a) All metals are ductile.(b) All non-metals are ductile.(c) Generally metals are ductile.(d) Some non-metals are ductile.**

(class:
8th std
)
Science

**Can you store acidic lemon pickles in an aluminium utensil? Explain.**

(class:
8th std
)
Science

**Name a non-metal which is a good conductor of heat and electricity.**

(class:
8th std
)
Science