Question : If a + b + c = 15 and a² + b² + c² = 83 then the value of a³ + b³ + c³ – 3abc:

Option 1: 200

Option 2: 180

Option 3: 190

Option 4: 210

Question : Directions: What will come in the place of the question mark (?) in the following equation if + and – are interchanged and × and ÷ are interchanged?
6 + 15 × 5 – 4 ÷ 3 = ?

Option 1: 12

Option 2: 21

Option 3: 18

Option 4: 15

Question : The correct electronic configuration of Cu is:

Option 1: [Ar]3 d⁹ 4 s²

Option 2: [Kr]3 d⁹ s²

Option 3: [Kr]3 d¹⁰ s¹

Option 4: [Ar]3 d¹⁰ 4 s¹

Question : Which of the following correctly represents the number of atoms in one mole of CH₃OH?

Option 1: 6.0*10²³

Option 2: 3.6*10²⁴

Option 3: 3.0 *10²⁵

Option 4: 3

Question : What is the value of $\frac{15 \div 5 \times 3-12 \times 12 \div 6+15 \div 5 \times 6}{18 \div 3 \times 5-12 \div 6 \times 5+18 \div 9 \times 5} ?$

Option 1: $\frac{1}{20}$

Option 2: $\frac{1}{5}$

Option 3: $\frac{1}{15}$

Option 4: $\frac{1}{10}$