Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 488 · 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: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
2. 2.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 20 (b) not enough info (c) 16 (d) 8
3. 3.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
4. 4.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
5. 5.🧩 Rohan bought 2 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹60 (b) not enough info (c) ₹65 (d) ₹120
6. 6.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
7. 7.🧩 Saanvi is 6 years old. Arjun is 7 years older than Saanvi. How old is Arjun? (a) 7 (b) 14 (c) 13 (d) not enough info
8. 8.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) enough evidence (b) not enough evidence
9. 9.🧩 Nisha is 11 years old. Kabir is older than Nisha. How old is Kabir? (a) 16 (b) 12 (c) 13 (d) not enough info
10. 10.🧩 Kabir bought 3 balls for ₹150 in all. Each ball cost the same. What did one ball cost? (a) ₹150 (b) ₹55 (c) not enough info (d) ₹50
11. 11.🧩 Tara bought 4 balls and a lunch box for ₹270 in all. Each ball cost the same. What did one ball cost? (a) ₹266 (b) not enough info (c) ₹67 (d) ₹270
12. 12.🧩 A box of guavas has 9 in each row. How many guavas are in the box? (a) 9 (b) not enough info (c) 18 (d) 90
13. 13.🧩 A box of mangoes has 9 in each row. How many mangoes are in the box? (a) 18 (b) 9 (c) 90 (d) not enough info
14. 14.🧩 Diya bought 2 pens for ₹70 in all. Each pen cost the same. What did one pen cost? (a) ₹70 (b) ₹40 (c) not enough info (d) ₹35
15. 15.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) False (b) True
16. 16.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 6 PM (b) not enough info (c) 8 PM (d) 7 PM
17. 17.🧩 Aarav is 10 years old. Arjun is older than Aarav. How old is Arjun? (a) 15 (b) 12 (c) not enough info (d) 11
18. 18.🥭 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, mangoes match (c) yes, it is certain (d) no mango is sweet
19. 19.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
20. 20.True or false: “One student said the canteen food was cold, so it is always cold.” does not give enough evidence. (a) False (b) True
21. 21.🧩 Aarav is 10 years old. Meera is older than Aarav. How old is Meera? (a) 11 (b) 12 (c) not enough info (d) 15
22. 22.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the colour of ink (d) the page number
23. 23.🧩 Rohan bought 3 markers for ₹75 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹30 (c) ₹25 (d) ₹75
24. 24.🧩 Aarav bought 5 balls and a lunch box for ₹80 in all. Each ball cost the same. What did one ball cost? (a) ₹75 (b) not enough info (c) ₹16 (d) ₹80
25. 25.🧩 Aarav is 11 years old. Vihaan is older than Aarav. How old is Vihaan? (a) 12 (b) 13 (c) not enough info (d) 16
26. 26.🧩 A box has 4 rows of eggs, with 9 in each row. How many eggs are in the box? (a) not enough info (b) 36 (c) 13 (d) 45
27. 27.🧩 Vihaan bought 4 notebooks and a bag for ₹140 in all. Each notebook cost the same. What did one notebook cost? (a) ₹136 (b) ₹35 (c) ₹140 (d) not enough info
28. 28.🧩 Vihaan bought 5 markers for ₹150 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹35 (c) ₹150 (d) ₹30
29. 29.🧩 Vihaan bought 5 mangoes for ₹225 in all. Each mango cost the same. What did one mango cost? (a) ₹45 (b) ₹50 (c) not enough info (d) ₹225
30. 30.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) not enough info (b) 3 PM (c) 4 PM (d) 5 PM
31. 31.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
32. 32.🧩 Arjun bought 3 mangoes and a water bottle for ₹190 in all. Each mango cost the same. What did one mango cost? (a) ₹63 (b) ₹190 (c) ₹187 (d) not enough info
33. 33.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) guessing (c) asking your pet (d) asking the whole class
34. 34.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) not enough evidence (b) enough evidence
35. 35.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
36. 36.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) not enough evidence (b) enough evidence
37. 37.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) not enough evidence (b) enough evidence
38. 38.🧩 Meera bought 3 kites for ₹30 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹10 (c) ₹15 (d) ₹30
39. 39.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to change answers (d) to be sure of results
40. 40.🧩 A box of eggs has 4 in each row. How many eggs are in the box? (a) 40 (b) 8 (c) 4 (d) not enough info

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