Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 398 · 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.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 3 PM
2. 2.🧩 Ishaan is 8 years old. Kabir is 8 years older than Ishaan. How old is Kabir? (a) 16 (b) not enough info (c) 8 (d) 17
3. 3.🐕 One dog barked at you. What is the fair conclusion? (a) never see dogs (b) all dogs are mean (c) dogs hate you (d) that one dog barked
4. 4.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a guess (d) a rumour
5. 5.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
6. 6.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) asking one friend (c) guessing (d) asking the whole class
7. 7.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) False (b) True
8. 8.🧩 Diya is 9 years old. Saanvi is older than Diya. How old is Saanvi? (a) not enough info (b) 14 (c) 10 (d) 11
9. 9.🧩 Ananya is 8 years old. Tara is 2 years older than Ananya. How old is Tara? (a) 11 (b) not enough info (c) 10 (d) 2
10. 10.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) 90 (b) 18 (c) not enough info (d) 9
11. 11.🧩 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
12. 12.🧩 Vihaan is 9 years old. Ishaan is 7 years older than Vihaan. How old is Ishaan? (a) 7 (b) not enough info (c) 16 (d) 17
13. 13.🧩 Meera is 8 years old. Rohan is older than Meera. How old is Rohan? (a) not enough info (b) 10 (c) 13 (d) 9
14. 14.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 9 PM
15. 15.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
16. 16.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
17. 17.🧩 Arjun bought 4 kites for ₹60 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹60 (c) ₹15 (d) ₹20
18. 18.🧩 Arjun bought 4 balls and a cap for ₹260 in all. Each ball cost the same. What did one ball cost? (a) ₹260 (b) ₹256 (c) ₹65 (d) not enough info
19. 19.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) not enough info (b) 3 PM (c) 4 PM (d) 5 PM
20. 20.🧩 Arjun bought 4 notebooks for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹140 (b) ₹35 (c) not enough info (d) ₹40
21. 21.🧩 Before solving a word problem, first check… (a) the page number (b) the colour of ink (c) your handwriting (d) what facts are given
22. 22.🧩 A box has 8 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 16 (b) not enough info (c) 72 (d) 64
23. 23.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
24. 24.🧩 Diya bought 4 markers for ₹80 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹80 (c) ₹20 (d) ₹25
25. 25.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 8 PM
26. 26.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 6 PM
27. 27.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
28. 28.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) for fun only (d) to be sure of results
29. 29.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
30. 30.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
31. 31.🧩 Saanvi is 10 years old. Nisha is 2 years older than Saanvi. How old is Nisha? (a) 12 (b) 2 (c) not enough info (d) 13
32. 32.🧩 A box has 5 rows of apples, with 8 in each row. How many apples are in the box? (a) not enough info (b) 48 (c) 40 (d) 13
33. 33.🧩 The film starts at 6 PM and lasts 1 hour. When does it end? (a) 6 PM (b) 7 PM (c) not enough info (d) 8 PM
34. 34.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) True (b) False
35. 35.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) True (b) False
36. 36.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Meera bought 2 pens for ₹120 in all. Each pen cost the same. What did one pen cost? (a) ₹60 (b) ₹120 (c) ₹65 (d) not enough info
38. 38.🧩 Ishaan bought 6 pens and a bag for ₹300 in all. Each pen cost the same. What did one pen cost? (a) ₹294 (b) ₹300 (c) ₹50 (d) not enough info
39. 39.🧩 Aarav is 7 years old. Nisha is older than Aarav. How old is Nisha? (a) 9 (b) 12 (c) 8 (d) not enough info
40. 40.🧩 A box has 6 rows of eggs, with 5 in each row. How many eggs are in the box? (a) not enough info (b) 30 (c) 11 (d) 35

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