Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 770 · 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: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) True (b) False
2. 2.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
3. 3.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
4. 4.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
5. 5.🐕 One dog barked at you. What is the fair conclusion? (a) dogs hate you (b) that one dog barked (c) all dogs are mean (d) never see dogs
6. 6.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
7. 7.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) True (b) False
8. 8.🧩 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
9. 9.🧩 Tara bought 3 notebooks and a lunch box for ₹195 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹192 (c) ₹195 (d) ₹65
10. 10.🧩 Diya is 11 years old. Aarav is 5 years older than Diya. How old is Aarav? (a) 5 (b) 16 (c) 17 (d) not enough info
11. 11.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
12. 12.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 4 PM (b) 3 PM (c) 2 PM (d) not enough info
13. 13.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking the whole class (c) asking your pet (d) guessing
14. 14.🧩 A box of eggs has 7 in each row. How many eggs are in the box? (a) 7 (b) not enough info (c) 70 (d) 14
15. 15.🧩 The film starts at 2 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 4 PM (c) not enough info (d) 2 PM
16. 16.🧩 Saanvi is 10 years old. Arjun is 2 years older than Saanvi. How old is Arjun? (a) 13 (b) 2 (c) 12 (d) not enough info
17. 17.🧩 A box of eggs has 8 in each row. How many eggs are in the box? (a) 80 (b) 16 (c) 8 (d) not enough info
18. 18.🧩 Vihaan bought 2 kites and a water bottle for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹120 (b) not enough info (c) ₹60 (d) ₹118
19. 19.🧩 Vihaan bought 5 pens and a bag for ₹155 in all. Each pen cost the same. What did one pen cost? (a) ₹150 (b) not enough info (c) ₹31 (d) ₹155
20. 20.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
21. 21.🧩 Ishaan bought 5 mangoes for ₹75 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) ₹75 (c) ₹15 (d) not enough info
22. 22.🧩 Before solving a word problem, first check… (a) your handwriting (b) the page number (c) what facts are given (d) the colour of ink
23. 23.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
24. 24.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to change answers (c) to be sure of results (d) to waste time
25. 25.🧩 Diya bought 3 kites for ₹75 in all. Each kite cost the same. What did one kite cost? (a) ₹30 (b) not enough info (c) ₹25 (d) ₹75
26. 26.🧩 A box has 6 rows of apples, with 4 in each row. How many apples are in the box? (a) 10 (b) 24 (c) 28 (d) not enough info
27. 27.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
28. 28.🧩 Ananya bought 2 kites and a water bottle for ₹140 in all. Each kite cost the same. What did one kite cost? (a) ₹138 (b) ₹140 (c) not enough info (d) ₹70
29. 29.🧩 Ananya is 11 years old. Meera is older than Ananya. How old is Meera? (a) not enough info (b) 13 (c) 16 (d) 12
30. 30.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
31. 31.🧩 Aarav bought 5 balls and a water bottle for ₹305 in all. Each ball cost the same. What did one ball cost? (a) not enough info (b) ₹61 (c) ₹300 (d) ₹305
32. 32.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
33. 33.🧩 Tara bought 5 notebooks and a water bottle for ₹135 in all. Each notebook cost the same. What did one notebook cost? (a) ₹27 (b) ₹130 (c) ₹135 (d) not enough info
34. 34.🧩 Saanvi bought 3 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹150 (b) ₹55 (c) not enough info (d) ₹50
35. 35.🧩 A box of laddoos has 5 in each row. How many laddoos are in the box? (a) 50 (b) 10 (c) not enough info (d) 5
36. 36.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) True (b) False
37. 37.🧩 Ananya bought 6 pens for ₹90 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹15 (c) ₹90 (d) ₹20
38. 38.🧩 Ishaan bought 5 notebooks and a water bottle for ₹320 in all. Each notebook cost the same. What did one notebook cost? (a) ₹64 (b) ₹315 (c) ₹320 (d) not enough info
39. 39.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
40. 40.🧩 Meera is 12 years old. Ananya is 4 years older than Meera. How old is Ananya? (a) 17 (b) 16 (c) 4 (d) not enough info

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