Correct Answer: B (int, float, complex) Python has three built-in numeric types. int for whole numbers (unlimited size). float for decimal numbers (based on IEEE 754, limited precision). complex for numbers with a real and imaginary part (written as a + bj). The other options are incorrect. “double” is not a separate type in Python (float is double precision). “decimal” requires importing the decimal module. And “imaginary” alone is not a type (it is part of complex).

Correct Answer: B (/ returns a float, // returns an integer after floor division) The / operator always performs true division and returns a float, even when the result is a whole number (10 / 2 becomes 5.0). The // operator performs floor division. It divides and rounds down to the nearest integer (toward negative infinity). For positive numbers, this works like truncation. For negative numbers, it can surprise you: -10 // 3 returns -4, not -3.

Correct Answer: B (Floats cannot represent some decimal numbers exactly in binary) Computers store numbers in binary (base 2). Just as 1/3 cannot be represented exactly in decimal (0.33333…), certain decimal numbers like 0.1 and 0.2 cannot be represented exactly in binary. When you add them, the tiny rounding errors accumulate, resulting in 0.30000000000000004 instead of 0.3. This is not a Python bug. It is a limitation of how all modern computers handle floating point numbers (IEEE 754 standard). To compare floats safely, check if the absolute difference is very small: abs(a – b) < 1e-9.

Correct Answer: B (3, truncated toward zero) The int() function truncates toward zero. It simply removes the decimal part without rounding. int(3.99) becomes 3, not 4. If you need rounding, use round(3.99) which returns 4.0. Or math.floor() for rounding down or math.ceil() for rounding up.

Correct Answer: B (-3) Floor division // always rounds down toward negative infinity, not toward zero. -7 divided by 3 is approximately -2.333… Rounding down toward negative infinity gives -3. But be careful with other negative combinations. -10 // 3 is -4 because -10 ÷ 3 = -3.333… which rounds down to -4. The rule is consistent: floor division always rounds toward negative infinity.

Correct Answer: B (2 to the power of 5 = 32) The ** operator is exponentiation (power). It raises the number on the left to the power of the number on the right. 2 ** 5 means 2 × 2 × 2 × 2 × 2 = 32. You can also use the pow() function: pow(2, 5) also returns 32.

Correct Answer: C (The number 1000000, one million) Python allows underscores in numeric literals to improve readability. The underscores are ignored completely. 1_000_000, 10_00_00, and 1000000 all represent the same number. You can use underscores anywhere in a number except at the beginning or end. This is especially useful for large numbers (like 1_000_000_000) or binary/hexadecimal numbers (0b1111_0000 or 0xFF_00_FF).

Correct Answer: C (It returns a very large integer with 1001 digits) Python integers have unlimited precision. They can grow to any size limited only by your computer’s memory. 10 ** 1000 is a 1 followed by 1000 zeros (a thousand digits). Python handles this effortlessly. This is different from many other languages (like C, Java, or Go) where integers have fixed sizes and would overflow or crash. Floats, however, do have limits (about 1.8e308) and would return inf (infinity) for numbers this large.

Correct Answer: B (2, the remainder) The % operator is the modulus or remainder operator. It returns the remainder after division. 17 divided by 5 equals 3 with a remainder of 2 (because 5 × 3 = 15, and 17 – 15 = 2). Modulus is extremely useful for checking even/odd numbers (number % 2 == 0), cycling through ranges, and many other patterns.

Correct Answer: B (<class ‘float’>) The type() function returns the type of an object. Even though 42.0 has no fractional part, the presence of a decimal point makes it a float in Python. To create an integer, write 42 (without the decimal point). The decimal point is the signal to Python that you want a float.

Challenge 1 Answers: – a / b = 2.5 (float division) – a // b = 2 (floor division) – a % b = 1 (remainder) – a ** b = 25 (power) Challenge 2 Answers: – int(7.9) = 7 (truncates toward zero) – round(7.9) = 8 (rounds to nearest integer) – int(-7.9) = -7 (truncates toward zero) – -7 // 3 = -3 (floor division rounds down toward negative infinity) Challenge 3 Answers: All of them are valid! 1_234 is an integer with underscore for readability. 0xFF is hexadecimal (255 in decimal). 3 + 2j is a complex number. 1.5e-3 is scientific notation (0.0015 as a float).