Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 421 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking the whole class (c) asking one friend (d) asking your pet
3. 3.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Before solving a word problem, first check… (a) the page number (b) what facts are given (c) the colour of ink (d) your handwriting
5. 5.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
6. 6.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) not enough info (b) 10 (c) 50 (d) 5
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
8. 8.🧩 Ishaan is 6 years old. Nisha is 7 years older than Ishaan. How old is Nisha? (a) not enough info (b) 13 (c) 7 (d) 14
9. 9.🧩 Rohan is 10 years old. Ishaan is 2 years older than Rohan. How old is Ishaan? (a) 2 (b) 13 (c) not enough info (d) 12
10. 10.🧩 Nisha is 9 years old. Kabir is older than Nisha. How old is Kabir? (a) not enough info (b) 14 (c) 10 (d) 11
11. 11.🧩 Meera is 9 years old. Nisha is older than Meera. How old is Nisha? (a) 14 (b) not enough info (c) 10 (d) 11
12. 12.🧩 Meera is 7 years old. Saanvi is 2 years older than Meera. How old is Saanvi? (a) 10 (b) 9 (c) not enough info (d) 2
13. 13.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
14. 14.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
15. 15.🧩 Nisha is 10 years old. Ishaan is older than Nisha. How old is Ishaan? (a) 15 (b) 11 (c) 12 (d) not enough info
16. 16.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) False (b) True
17. 17.📝 What does “evidence” mean? (a) a rumour (b) facts that support it (c) a loud opinion (d) a guess
18. 18.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) not enough info (b) 5 PM (c) 4 PM (d) 2 PM
19. 19.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) dogs hate you (c) never see dogs (d) that one dog barked
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
21. 21.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
22. 22.🧩 Vihaan is 6 years old. Kabir is older than Vihaan. How old is Kabir? (a) 11 (b) not enough info (c) 8 (d) 7
23. 23.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
24. 24.🧩 Rohan is 12 years old. Kabir is 2 years older than Rohan. How old is Kabir? (a) not enough info (b) 15 (c) 14 (d) 2
25. 25.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
26. 26.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
27. 27.🧩 A box of apples has 6 in each row. How many apples are in the box? (a) 60 (b) not enough info (c) 12 (d) 6
28. 28.🧩 A box has 3 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 28 (b) 10 (c) 21 (d) not enough info
29. 29.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
30. 30.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no, check more (b) yes, it is certain (c) no mango is sweet (d) yes, mangoes match
31. 31.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 9 PM (d) 6 PM
32. 32.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to be sure of results (c) for fun only (d) to change answers
33. 33.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
34. 34.🧩 Aarav bought 4 balls for ₹180 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹50 (c) ₹180 (d) ₹45
35. 35.🧩 Vihaan bought 3 kites and a cap for ₹185 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹61 (c) ₹182 (d) ₹185
36. 36.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Diya bought 5 kites and a cap for ₹220 in all. Each kite cost the same. What did one kite cost? (a) ₹44 (b) ₹220 (c) ₹215 (d) not enough info
38. 38.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 4 PM (d) 6 PM
39. 39.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
40. 40.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) not enough info (b) 6 PM (c) 9 PM (d) 10 PM

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