Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 767 · 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 measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
2. 2.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only
3. 3.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
4. 4.🧩 Tara bought 6 markers and a cap for ₹160 in all. Each marker cost the same. What did one marker cost? (a) ₹154 (b) not enough info (c) ₹160 (d) ₹26
5. 5.🧩 Vihaan bought 2 notebooks for ₹90 in all. Each notebook cost the same. What did one notebook cost? (a) ₹45 (b) not enough info (c) ₹90 (d) ₹50
6. 6.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
7. 7.🧩 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
8. 8.🧩 Aarav bought 5 pens for ₹225 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹45 (c) ₹225 (d) ₹50
9. 9.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
10. 10.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
11. 11.🧩 Ishaan bought 4 mangoes for ₹240 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) not enough info (c) ₹60 (d) ₹240
12. 12.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
13. 13.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
14. 14.🧩 Kabir is 11 years old. Diya is 3 years older than Kabir. How old is Diya? (a) 3 (b) 14 (c) 15 (d) not enough info
15. 15.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
16. 16.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) not enough info (d) 5 PM
17. 17.🧩 Aarav bought 4 kites and a lunch box for ₹80 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) not enough info (c) ₹76 (d) ₹80
18. 18.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 8 PM (b) 6 PM (c) 7 PM (d) not enough info
19. 19.🧩 Rohan is 8 years old. Ishaan is 7 years older than Rohan. How old is Ishaan? (a) 7 (b) 16 (c) not enough info (d) 15
20. 20.🧩 Ishaan is 12 years old. Saanvi is 7 years older than Ishaan. How old is Saanvi? (a) 19 (b) 7 (c) not enough info (d) 20
21. 21.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) False (b) True
22. 22.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
23. 23.🧩 Arjun bought 6 kites for ₹240 in all. Each kite cost the same. What did one kite cost? (a) ₹45 (b) ₹240 (c) not enough info (d) ₹40
24. 24.🧩 The film starts at 3 PM. It is a long film. When does it end? (a) 4 PM (b) 6 PM (c) 5 PM (d) not enough info
25. 25.🧩 The film starts at 3 PM and lasts 2 hours. When does it end? (a) 5 PM (b) not enough info (c) 3 PM (d) 6 PM
26. 26.📝 What does “evidence” mean? (a) a loud opinion (b) a rumour (c) a guess (d) facts that support it
27. 27.🧩 A box of oranges has 6 in each row. How many oranges are in the box? (a) 6 (b) not enough info (c) 60 (d) 12
28. 28.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) enough evidence (b) not enough evidence
29. 29.🧩 The film starts at 2 PM and lasts 3 hours. When does it end? (a) 5 PM (b) not enough info (c) 6 PM (d) 2 PM
30. 30.🧩 A box has 3 rows of guavas, with 7 in each row. How many guavas are in the box? (a) 10 (b) 21 (c) not enough info (d) 28
31. 31.🧩 Meera bought 5 pens and a bag for ₹265 in all. Each pen cost the same. What did one pen cost? (a) not enough info (b) ₹265 (c) ₹260 (d) ₹53
32. 32.🧩 Ishaan bought 3 markers for ₹105 in all. Each marker cost the same. What did one marker cost? (a) ₹105 (b) ₹35 (c) not enough info (d) ₹40
33. 33.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
34. 34.🧩 Kabir is 7 years old. Tara is 9 years older than Kabir. How old is Tara? (a) 16 (b) 9 (c) not enough info (d) 17
35. 35.🧩 Tara bought 5 balls and a water bottle for ₹280 in all. Each ball cost the same. What did one ball cost? (a) ₹275 (b) ₹56 (c) ₹280 (d) not enough info
36. 36.🧩 Meera bought 6 mangoes for ₹270 in all. Each mango cost the same. What did one mango cost? (a) ₹270 (b) ₹50 (c) ₹45 (d) not enough info
37. 37.🧩 A box has 6 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 48 (b) 14 (c) 56 (d) not enough info
38. 38.🧩 A box has 3 rows of apples, with 4 in each row. How many apples are in the box? (a) 7 (b) not enough info (c) 12 (d) 16
39. 39.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) False (b) True
40. 40.🧩 The film starts at 6 PM. It is a long film. When does it end? (a) 8 PM (b) 7 PM (c) 9 PM (d) not enough info

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