Q1. Which of the following statement is true?
(a) 1 is the smallest prime number
(b) Every prime number is an odd number
(c) The sum of two prime numbers is always a prime number
(d) None of these
Q2. The rational number 0/7
(a) has a positive numerator
(b) has a negative numerator
(c) has either a positive numerator or a negative numerator
(d) has neither a positive numerator nor a negative numerator
Q3. The least number of 4 digits which is a perfect square is
Q4. The number which is neither prime nor composite is
Q5. What is the LCM of 108 and 144?
Q6. A glass is full of 200 mL water, it means
(a) the capacity of glass is 200 mL
(b) the water cannot be fill up more than 200 mL
(c) the volume of glass is 200 mL
(d) All above statement are true
Q7. If Ram have three marbles of radius r. If all marbles are same in colours and size, then total volume will be
(a) 4πr³ cubic unit
(b) 4/3πr³ cubic unit
(c) 3πr² cubic unit
(d) 3/4πr³d cubic unit
Q8. 7775, 7775, 7775, 77………..
Q9. Which is a plane in the following?
(a) Paper sheet
Q10. Which of the following statements is not true?
(a) The figure formed by two rays passing through a point is called an angle
(b) A closed figure formed by three line segments is called a triangle
(c) A figure formed by three lines is called a triangle
(d) In a rectangle the length of opposite sides is same and each angle is a right angle
Sol. All the given statements are false.
Sol. Since 0 has either a positive sign or a negative sign.
Sol. By trail and error method, (1), (2) and (3) are not perfect squares. 1024 = 32 × 32 = 32².
Sol. LCM of 108 and 144
LCM = 12 × 3 × 3 × 4 = 432.
Sol. Here, all statements are true.
Sol. Total volume = 3 × 4/3πr³ = 4πr³ cubic unit