science & technology Online Quiz - 101

Temperature rises (goes up) and falls (goes down) over time, but temperature itself is a measurement at a location - it doesn't move spatially like a ball, bird, or flight would.

Charcoal is black when you purchase it. When burned, it glows red. After use, it turns to grey ash. This is a classic lateral-thinking riddle that tests observational knowledge.

The boat rises with the tide. Since the ladder is attached to the boat, all rungs maintain their position relative to the water. If the bottom rung was 1 foot from water initially, it remains 1 foot from water at high tide.

Half of two equals 1. Adding 2 to 1 gives 3. The phrasing tests order of operations - half of two (1) plus two (2) equals 3.

The answer relies on wordplay. 'Shoots' refers to taking a photograph, 'holds under water' is developing film in chemicals, and 'hangs' means hanging the photo to dry. A photographer and her subject (husband) can then go to dinner together.

If all four walls face south, the house must be at the North Pole. The only bears found at the North Pole are polar bears, which are white.

When haystacks are combined, they merge into one larger haystack. 5 haystacks + 4 haystacks placed together = 1 large haystack, not 9 separate ones.

The question is a riddle. You can name three consecutive days using relative terms instead of specific weekday names: yesterday, today, and tomorrow.

This is a wordplay riddle. The word 'incorrectly' is always pronounced as 'incorrectly' - that's its correct pronunciation. The riddle tricks you into thinking about commonly mispronounced words.

A hole contains no dirt - it's empty space. By definition, once dirt is removed to create a hole, the hole contains nothing.

Temperature is a measurement that fluctuates (goes up and down) based on environmental conditions, but it does not physically move from one location to another like a ball, bird, or flight.

Charcoal is black when you purchase it. When burned, it glows red. After use, it turns to grey ash. This is a classic lateral-thinking riddle.

When the tide rises, the boat and its attached ladder rise along with the water. Therefore, the relative distance between the water and the rungs remains constant, and no rungs go underwater.

Following the order of operations (BODMAS/PEMDAS), 'half of two' (1) is calculated first, then 'plus two' is added (1 + 2 = 3). If it meant half of the sum, it would be (2+2)/2=2.

This is a classic riddle. The woman is a photographer; she 'shoots' a photo of her husband, 'develops' it in water (in a darkroom), and 'hangs' the print to dry. No crime was committed.

If all four walls face south, the house must be at the North Pole. The only bears found at the North Pole are polar bears, which are white.

When haystacks are combined, they merge into one larger haystack. 5 haystacks + 4 haystacks placed together = 1 large haystack, not 9 separate ones.

The adult human brain weighs approximately 1.3-1.4 kg, which is roughly 3 pounds. Options A (1 pound), C (5 pounds), and D (7 pounds) are all incorrect - the brain is heavier than 1 pound but much lighter than 5-7 pounds.

The human brain consists of white matter (myelinated axons) and grey matter (neuron cell bodies and unmyelinated fibers). Options A, B, and D are all incorrect - those are not actual biological components of brain tissue.

The human brain floats in cerebrospinal fluid (CSF), which cushions it within the skull. Options B (Spinal tab), C (Brain cocktail), and D (Parietal Fluid) are all fictional or incorrect terms.